Risk grouping in stage IB squamous cell cervical carcinoma

Area of Science:

• Gynecologic Oncology
• Surgical Pathology
• Oncology

Background:

• Early-stage squamous cervical carcinoma (SCC) requires accurate prognostic assessment for treatment planning.
• The Gynecologic Oncology Group (GOG) developed prognostic criteria including stromal invasion, tumor size, and vascular invasion.

Purpose of the Study:

• To validate the GOG prognostic criteria in an independent patient population with early SCC.
• To evaluate the prognostic performance of a simplified risk model.

Main Methods:

• Retrospective analysis of 221 patients with stage IB SCC undergoing radical hysterectomy and bilateral lymphadenectomy.
• Histological review of all specimens by a single pathologist.
• Assessment of adjuvant treatment based on tumor size, lymph node status, and parametrial invasion.

Main Results:

• The GOG criteria effectively stratified patients into low (100% 3-year relapse-free rate), intermediate (80-90%), and high-risk (57%) groups, consistent with prior findings.
• A simplified model using two of the three GOG factors demonstrated comparable prognostic accuracy, particularly with interaction analysis.
• Tumor size (>2 cm) and outer cervical wall invasion were significant predictors of 5-year disease-free survival (DFS), with 56% DFS compared to 93% for smaller tumors or less invasion.

Conclusions:

• The GOG prognostic criteria are validated in an independent cohort for early squamous cervical carcinoma.
• A two-factor prognostic model may achieve similar predictive performance to the established three-factor GOG criteria.